  The desire to overcome reliability issues of distributed energy resources
(DERs) lead researchers to development of a novel concept named as virtual
power plant (VPP). VPPs are supposed to carry out intelligent, secure, and
smart energy trading among prosumers, buyers, and generating stations along
with providing efficient energy management. Therefore, integrating blockchain
in decentralized VPP network emerged out as a new paradigm, and recent
experiments over this integration have shown fruitful results. However, this
decentralization also suffers with energy management, trust, reliability, and
efficiency issues due to the dynamic nature of DERs. In order to overcome this,
in this paper, we first work over providing efficient energy management
strategy for VPP to enhance demand response, then we propose an energy oriented
trading and block mining protocol and named it as proof of energy market
(PoEM). To enhance it further, we integrate differential privacy in PoEM and
propose a Private PoEM (PPoEM) model. Collectively, we propose a private
decentralized VPP trading model and named it as Virtual Private Trading (VPT)
model. We further carry out extensive theoretical analysis and derive
step-by-step valuations for market race probability, market stability
probability, energy trading expectation, winning state probability, and
prospective leading time profit values. Afterwards, we carry out
simulation-based experiment of our proposed model. The performance evaluation
and theoretical analysis of our VPT model make it one of the most viable model
for blockchain based VPP network as compared to other state-of-the-art works.
